The Associated Press did an interesting fact check on the accuracy of statements made by the Presidential candidates of both parties. The result, shown in this graph, was high marks for Democrats and only one GOP candidate (Jeb Bush) getting a (barely) passing grade.

Graphic shows results of survey of scientists on candidates’ statements on climate change; 2c x 5 inches; 96.3 mm x 127 mm;
The study was done as objectively as possible. Eight climate scientists were shown candidate comments without identifying the candidates in any detectable way. Thus their findings are hardly subject to the charge that they were even incidentally partisan.
Interestingly, the top tier of GOP candidates are all near the bottom of the truth scale, with the recently trending Sen. Ted Cruz of Texas coming in at a dismal 6% accuracy. That result let one of the scientists evaluating the responses to say, “”This individual understands less about science (and climate change) than the average kindergartner. That sort of ignorance would be dangerous in a doorman, let alone a president.”
See, even scientists have a sense of humor!